Feature Request: Volcanoes

[I am transcribing my 5-year-old son's words directly; he asked me how to tell the creators of Minecraft his idea for the game, and I thought it was too cute an idea to pass up. I couldn't find an issue type for feature requests, but this obviously isn't a bug. My apologies in advance. He also chose this username for himself, and I am going to type what he says directly with no regard for grammar, only basic punctuation formatting.]

Basically, I want a volcano in Minecraft that I could easily make, and I also need it to have lava inside but I need something to make the volcano out of that is lava-proof. I'm going to need to know the way to make the volcano erupt and basically this is written by Lochington100. And that's all.